Types without battery can be supplied for temperature range up to -40÷70°C with a full functional test performed on each piece in the temperature & humidity chamber.
For more information please contact sales department.

MU-431, MU-432, MU-436, MU-437

The MU-43x modules are designed for monitoring the state of digital signals (switches, etc.) and pulse counting. Additionally, the MU-436 and MU-437 offer a powerful computing unit for calculation immediate and total consumption (electricity meters, water flowmeters, etc.).

Digital inputs are designed for signals with TTL levels or passive contact (an internal "pull-up" resistor or external against +24V is considered) and are equipped with digital low-pass filters to suppress "ringing" on input signals.

Modules MU-431 and MU-432 include four 32-bit counters with value preset and start/stop capability by Modbus RTU command via RS-485.

Modules MU-436 and MU-437 include four 109 counters with value preset and start/stop capability by Modbus RTU command via RS-485. Additionally, they are also equipped with a powerful computing unit and set of counters/timers for calculating following values:

immediate consumption; it is proportional to the signal frequency (can be configured using several parameters)

capturing counter and computing unit values at a preset time (MU-432 and MU-437 modules only)

In case of a power-off, the counter and computing unit values are backed up in EEPROM (does not require a backup battery limiting temperature range). After power-on the counters and computing unit registers can optionally continue from either a backed up value or a zero value.

Additionally, the MU-432 and MU-437 modules are equipped with real-time clock circuit (abbreviation RTC) allowing e.g. to back up the power supply failure time. RTC circuit requires a battery and these types can not be supplied for extended temperature range.

Note:In applications where isolated inputs or eight counters are needed, modules MU-44x or MU-84x series can be recommended.